A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5920-01-446-4524
NSN 5910-01-266-9931
NSN 5835-01-362-8367
NSN 5920-01-089-0644
NSN 5990-00-334-8836
NSN 5930-01-252-1497
NSN 5965-00-230-8818
NSN 5895-01-653-9439
NSN 5950-01-259-4731
NSN 6620-01-422-7012
NSN 6650-01-424-0974
NSN 6105-00-798-4110